Make sure you have sufficient pool capacity. If the pool capacity is insufficient, the storage system can suspend Thin Image pairs ("PSUE" status).
Note: When the setting, Suspend TI pairs when depletion threshold is exceeded, is set to Yes in HDvM - SN or in CCI by uisng the command, raidcom modify pool -suspend_tipair <yes> for a DP pool, the status of TI pairs using the pool might change to PSUE if the depletion threshold is exceeded. When it is set to No in HDvM - SN or in CCI by uisng the command, raidcom modify pool -suspend_tipair <no> for a TI pool or a DP pool, the status of TI pairs using the pool might change to PSUE if the pool becomes full.